Attributes . Hardness Scale . Values

177 to 212 BHN; Rockwel. (4)   200 to 235 BHN (4)   200 to 235 BHN; Rockwel. (2)   207 BHN Max (4)   220 to 255 BHN; Rockwel. (10)   221 to 225 BHN (2)   241 BHN m?x. (2)   241 BHN Max (11)   261 to 321 BHN (1)   275 BHN m?x. (2)   275 BHN Max (2)   341 BHN m?x. (4)   341 BHN Max (3)   BHN (210)   BHN; Rockwell (9)   BHN; Rockwell B (13)   Not Rated (9)   RB (68)   RC (45)   Rockwell (10)   Rockwell B (2)